Home
Class 12
PHYSICS
A galvanometer of resistance 20Ω is to b...

A galvanometer of resistance 20Ω is to be converted into an ammeter of range 1A . If a current of 1 mA produces full scale deflection, the shunt required for this purpose is

A

0.01 `(Omega)`

B

0.05 `(Omega)`

C

0.02 `(Omega)`

D

0.04 `(Omega)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETISM

    BINA LIBRARY|Exercise EXERCISE|105 Videos
  • ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENT

    BINA LIBRARY|Exercise EXERCISE|101 Videos
  • ELECTRONIC DEVICES

    BINA LIBRARY|Exercise EXERCISE|108 Videos

Similar Questions

Explore conceptually related problems

A galvanometer coil has a resistance of 10Omega and the meter shows full scale deflection for a current of 2.5 mA. How will you convery the metre into an ammeter of range 0 to 4A.

A galvanometer having a coil resistance 120 Omega shows full scale deflection for a current of 2.5 mA. How would you convert it into an ammeter of range 0 to 75A?

A miliammeter of resistance 5 ohms gives a full scale deflection for a current of 15 mA. If the milliammeter is to be used to measure currents upto 1.5 A the size of the resistance that must be attached to the milliammeter is ?

A galvanometer having a resistance of 50Ω gives a full scale deflection for a current of 0.05 A. The length in meter of a resistance wire of area of cross section 3×10^−3 cm^2 that can be used to convert the galvanometer into an ammeter which can read a maximum of 5A current is [specific resistance of the wire =5×10^−7 Ωm]

A galvanometer has an internal resistance of 1.0 ohm. It gives maximum deflection for current of 50 mA. Show how it can be converted into (i) a voltmeter with a maximum reading a of 2.5 volts, (ii) an ammeter with a maximum reading of 2.5 A.

An ammeter and a milliameter are converted from the same galvanometer. Out of two which current measuring instrument has smaller resistance?

BINA LIBRARY-ELECTROMAGNETISM-EXERCISE
  1. A moving coil galvanometer has resistance 50Omega. The maximum bearabl...

    Text Solution

    |

  2. A proton enters a magnetic field of flux density 1.5Wb/m^2 with a sp...

    Text Solution

    |

  3. An electron and a proton enter a magnetic field perpendicularly. Both ...

    Text Solution

    |

  4. The earth's magnetic induction at a certain point is [7x 10^(-5)Wbm^-2...

    Text Solution

    |

  5. Two concentric circular coils of 10 turns cach are situated in the sam...

    Text Solution

    |

  6. A long copper tube of inner radius R carries a current I. The magnetie...

    Text Solution

    |

  7. Two long parallel wires carry equal current I in the same direction. T...

    Text Solution

    |

  8. In order to increase the sensitivity of a moving coil galvanometer one...

    Text Solution

    |

  9. A galvanometer has a resistance of 25Omega and a maximum of 0.01A curr...

    Text Solution

    |

  10. A voltmeter of resistance (2 x 10^4 Omega) reads 5V. To make it read 2...

    Text Solution

    |

  11. A galvanometer of resistance 20Ω is to be converted into an ammeter of...

    Text Solution

    |

  12. Two long parallel wires carry equal current I in the same direction. T...

    Text Solution

    |

  13. An electric charge moves with a constant velocity v parallel to the li...

    Text Solution

    |

  14. When a magnetic field is applied on an electron moving with uniform ve...

    Text Solution

    |

  15. A stationary electron placed in a magnetic field experiences a mechani...

    Text Solution

    |

  16. The force acting on an electron at rest in a uniform magnetic field B ...

    Text Solution

    |

  17. A conducting circular loop of radius r carries a current I. It is plac...

    Text Solution

    |

  18. Earth's magnetic field always has a horizontal component except at

    Text Solution

    |

  19. Distinguish among paramagnetic , ferromagnetic and diamagnetic materia...

    Text Solution

    |

  20. Demagnetisation of magnets is effected by

    Text Solution

    |